US Bridges

State Route 116 over Drake Road

Fair

Sonoma County, California · 04-SON-116-R12.42 · Structure no. 20 0255

Built
1999
26 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
172 ft
5 main spans
Daily traffic
8,450
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 116 over Drake Road is a concrete continuous slab carrying State Route 116 over Drake Road in Sonoma County, California. It was built in 1999, so it is 26 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,450 vehicles a day, roughly 4% of them trucks, projected to reach 8,859 by 2046. The structure is 172 ft (52.4 m) long and 54 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesState Route 116
CrossesDrake Road
Location04-SON-116-R12.42
RouteState Highway 116
CountySonoma County
StateCalifornia
Coordinates38.49939, -122.99371
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length172 ft (52.4 m)
Longest span38 ft (11.6 m)
Deck width54 ft (16.6 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,450 (2009)
Projected traffic8,859 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 116 over Drake Road built?

It was built in 1999, making it 26 years old in 2025.

What condition is State Route 116 over Drake Road in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does State Route 116 over Drake Road carry?

About 8,450 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is State Route 116 over Drake Road?

The structure is 172 ft (52.4 m) long with a longest span of 38 ft (11.6 m) and a deck 54 ft wide.

Who owns State Route 116 over Drake Road?

It is owned by the State Highway Agency.